The Flea Beetles Have Moved to My Kale

I think I should have just left the arugula in the ground to attract the flea beetles that subsequently moved to my kale. I came home from vacation to this:

Flea beetle damage on my kale

Flea beetle damage on my kale

Now, the little buggers were already taking a few bites here and there before I left, but they seem to have multiplied.

Why Does My Arugula Have Holes?

I have five arugula plants. Every single arugula plant looks like someone took a pin and poked holes in it.

I did a quick search on one of the best resources for gardening out there, and found that the likely culprit is flea beetles. 

Arugula with holes in it